Merge pull request #7 from bbarker/master

LU pseudocode and gnumber comments & additions.
Updating: re-organizing prelude/gnumber
Updating: re-organizing various code.
Updating: adding libfloats/test_LUdec
Updating: very minorly improving.
Updating: improving libats/gmatrix.
Updating: improving libats/gmatrix and libfloats/blas
Updating: improving libats/gmatrix.
Updating: very minorly improving.
adding some minor notes for LU
Merge remote-tracking branch 'upstream/master' into develop
Updating: improving libats/gmatrix
Updating: tidying up libfloats/test_LUPdec.dats
copied some gmatrix_row funs to gmatrix_col; added some LU notes
Merge remote-tracking branch 'upstream/master' into develop

Conflicts:
	contrib/libfloats/TEST/test_LUPdec.dats